One Stop GATE Forum: 1998- year ECE GATE Paper

Message

1.  A network  has 7 nodes and  5 independent  loops. The number of branches in the 
network is   
  (a)  13  (b)  12  (c)  11  (d) 10 

2.The eigen values of the matrix A =  0 1
                                                                   1 0
  are:
  (a)  1,1  (b)  -1,-1  (c)  j,-j  (d) 1,-1 

3. The trigonometric Fourier series of a periodic time function can have only 
 (a)  cosine terms      (b)  sine terms 
 (c)  cosine and sine terms   (d)  d.c. and cosine terms 

4. The nodal method of circuit analysis is based on 
 (a)  KVL and Ohm‘s law    (b)  KCL and Ohm‘s law 
 (c)  KCL and KVL      (d)  KCL, KVL and Ohm‘s law 

5. Superposition theorem is NOT applicable to networks containing 
 (a)  nonlinear elements    (b)  dependent voltage sources 
 (c)  dependent current sources  (d)  transformers 

6. The short-circuit admittance matrix of a two-port network is
  (a)  non-reciprocal and passive  (b)  non-reciprocal and active 
 (c)  reciprocal and passive 
 (d)  reciprocal and active 

7. The voltage across the terminals a and b in Fig.1.11 is 
 (a)  0.5 V 
 (b)  3.0 V 
 (c)  3.5 V 
 (d)  4.0 V 

8. The static characteristic of an adequately forward biased p-n junction is a straight line, if the plot is of 
  (a)  log I vs. log V  (b)  log I vs. V  (c)  I vs. log V  (d) I vs. V 

9. A long specimen of p-type semiconductor material 
 (a)  is positively charged 
 (b)  is electrically neutral 
 (c)  has an electric field directed along its length 
 (d)  acts as a dipole 

10.  The transfer function of a tachometer is of the form 

  (a)  Ks  (b)  K  (c)  k/(s+1)    (d)  k/s(s+1)

11.  In  the  Bode-plot  of a  unity feedback  control system, the  value of  phase  of G(j ) 
at the gain cross over frequency is œ125°. The phase margin of the system is 
  (a)  -125°  (b)  -55°  (c)  55°    (d) 125° 

12. The transfer function of a phase lead controller is  1 3
1
Ts
+ . The maximum value of 
phase provided by this controller is 
  (a)  90°  (b)  60°  (c)  45°  (d) 30° 

13.  The Nyquist plot of a phase transfer function g(j ) H(j ) of a system encloses the 
(-1,0) point. The gain margin of the system is 
  (a)  less than zero      (b)  zero 
 (c)  greater than zero     (d)  infinity 

14.  In a differential amplifier, CMRR can be improved by using an increased  
 (a)  emitter resistance    (b)  collector resistance 
 (c)  power supply voltages  (d)  source resistance 

15.  From a  measurement  of  the  rise time of the output  pulse  of  an  amplifier whose 
input  is  a  small  amplitude  square  wave,  one  can  estimate  the  following 
parameter of the amplifier:   
  (a)  gain-bandwidth product  (b)  slow rate   
 (c)  upper 3-dB frequency   (d)  lower 3-dB frequency 

16.  The emitter coupled pair of BJT‘s gives a linear transfer relation between the 
V only when the 
differential output voltage and the differential input voltage  i d
V is less a times the thermal voltage, where a is 
magnitude of  i d
  (a)  4  (b)  3  (c)  2  (d) 1 

17. In a shunt-shunt negative feedback amplifier, as compared to the basic amplifier 
 (a)  both, input and output impedances, decrease 
 (b)  input impedance decreases but output impedance increases 
 (c)  input impedance increases but output impedance decreases 
 (d)  both, input and output impedances increase 

Author	Message
Neha Agarwal Groupie Joined: 04Jan2007 Online Status: Offline Posts: 59	Topic: 1998- year ECE GATE Paper Posted: 14Feb2007 at 4:16pm
	1. A network has 7 nodes and 5 independent loops. The number of branches in the network is (a) 13 (b) 12 (c) 11 (d) 10 2.The eigen values of the matrix A = 0 1 1 0 are: (a) 1,1 (b) -1,-1 (c) j,-j (d) 1,-1 3. The trigonometric Fourier series of a periodic time function can have only (a) cosine terms (b) sine terms (c) cosine and sine terms (d) d.c. and cosine terms 4. The nodal method of circuit analysis is based on (a) KVL and Ohm‘s law (b) KCL and Ohm‘s law (c) KCL and KVL (d) KCL, KVL and Ohm‘s law 5. Superposition theorem is NOT applicable to networks containing (a) nonlinear elements (b) dependent voltage sources (c) dependent current sources (d) transformers 6. The short-circuit admittance matrix of a two-port network is (a) non-reciprocal and passive (b) non-reciprocal and active (c) reciprocal and passive (d) reciprocal and active 7. The voltage across the terminals a and b in Fig.1.11 is (a) 0.5 V (b) 3.0 V (c) 3.5 V (d) 4.0 V 8. The static characteristic of an adequately forward biased p-n junction is a straight line, if the plot is of (a) log I vs. log V (b) log I vs. V (c) I vs. log V (d) I vs. V 9. A long specimen of p-type semiconductor material (a) is positively charged (b) is electrically neutral (c) has an electric field directed along its length (d) acts as a dipole 10. The transfer function of a tachometer is of the form (a) Ks (b) K (c) k/(s+1) (d) k/s(s+1) 11. In the Bode-plot of a unity feedback control system, the value of phase of G(j ) at the gain cross over frequency is œ125°. The phase margin of the system is (a) -125° (b) -55° (c) 55° (d) 125° 12. The transfer function of a phase lead controller is 1 3 1 Ts + . The maximum value of phase provided by this controller is (a) 90° (b) 60° (c) 45° (d) 30° 13. The Nyquist plot of a phase transfer function g(j ) H(j ) of a system encloses the (-1,0) point. The gain margin of the system is (a) less than zero (b) zero (c) greater than zero (d) infinity 14. In a differential amplifier, CMRR can be improved by using an increased (a) emitter resistance (b) collector resistance (c) power supply voltages (d) source resistance 15. From a measurement of the rise time of the output pulse of an amplifier whose input is a small amplitude square wave, one can estimate the following parameter of the amplifier: (a) gain-bandwidth product (b) slow rate (c) upper 3-dB frequency (d) lower 3-dB frequency 16. The emitter coupled pair of BJT‘s gives a linear transfer relation between the V only when the differential output voltage and the differential input voltage i d V is less a times the thermal voltage, where a is magnitude of i d (a) 4 (b) 3 (c) 2 (d) 1 17. In a shunt-shunt negative feedback amplifier, as compared to the basic amplifier (a) both, input and output impedances, decrease (b) input impedance decreases but output impedance increases (c) input impedance increases but output impedance decreases (d) both, input and output impedances increase
	For more papers visit: http://onestopgate.com/gate-preparation// Post Resume: Click here to Upload your Resume & Apply for Jobs

	IP Logged


One Stop GATE Forum : GATE Previous Years Test Papers - Discuss Here : ECE Papers